665936 has 10 divisors (see below), whose sum is σ = 1290282. Its totient is φ = 332960.

The previous prime is 665923. The next prime is 665947. The reversal of 665936 is 639566.

It can be written as a sum of positive squares in only one way, i.e., 547600 + 118336 = 740^2 + 344^2 .

It is a junction number, because it is equal to n+sod(n) for n = 665896 and 665905.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 665936.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20795 + ... + 20826.

2⁶⁶⁵⁹³⁶ is an apocalyptic number.

It is an amenable number.

665936 is a deficient number, since it is larger than the sum of its proper divisors (624346).

665936 is a wasteful number, since it uses less digits than its factorization.

665936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41629 (or 41623 counting only the distinct ones).

The product of its digits is 29160, while the sum is 35.

The square root of 665936 is about 816.0490181356. The cubic root of 665936 is about 87.3261200007.

The spelling of 665936 in words is "six hundred sixty-five thousand, nine hundred thirty-six".